Vertical distribution of foliar biomass in western larch (Larix occidentalis)
نویسندگان
چکیده
منابع مشابه
Photosynthetic decline and pigment loss during autumn foliar senescence in western larch (Larix occidentalis).
We measured needle pigment content and photosynthetic rates of 1-year-old western larch (Larix occidentalis Nutt.) during autumn foliar senescence. Chlorophyll (Chl) and carotenoid (xanthophyll + b-carotene) contents of needles declined 11 and 17%, respectively, before CO(2) assimilation rate began to decline. Chlorophyll a/b ratio, Chl/carotenoid ratio, photochemical efficiency (F(v)/F(m)), an...
متن کاملCajander larch (Larix cajanderi) biomass distribution, fire regime and post-fire recovery in northeastern Siberia
Climate change and land-use activities are increasing fire activity across much of the Siberian boreal forest, yet the climate feedbacks from forest disturbances remain difficult to quantify due to limited information on forest biomass distribution, disturbance regimes and post-disturbance ecosystem recovery. Our primary objective here was to analyse post-fire accumulation of Cajander larch (La...
متن کاملCarbon storage in old-growth and second growth fire-dependent western larch (Larix occidentalis Nutt.) forests of the Inland Northwest, USA
There is limited understanding of the carbon (C) storage capacity and overall ecological structure of oldgrowth forests of western Montana, leaving little ability to evaluate the role of old-growth forests in regional C cycles and ecosystem level C storage capacity. To investigate the difference in C storage between equivalent stands of contrasting age classes and management histories, we surve...
متن کاملCarbon dioxide exchange of larch (Larix gmelinii) cones during development.
Larch (Larix gmelinii (Rupr.) Rupr.) cone scales are green, but little is known of their photosynthetic role in cone development or about how they differ in gas exchange characteristics from needle leaves. In contrast to leaf photosynthesis (Pleaf), we found that stomatal regulation of cone photosynthetic rate (Pcone) was marginal because the photosynthetic carbon came from internal recycling o...
متن کاملGene expression associated with increased supercooling capability in xylem parenchyma cells of larch (Larix kaempferi).
Xylem parenchyma cells (XPCs) in larch adapt to subfreezing temperatures by deep supercooling, while cortical parenchyma cells (CPCs) undergo extracellular freezing. The temperature limits of supercooling in XPCs changed seasonally from -30 degrees C during summer to -60 degrees C during winter as measured by freezing resistance. Artificial deacclimation of larch twigs collected in winter reduc...
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ژورنال
عنوان ژورنال: Canadian Journal of Forest Research
سال: 2018
ISSN: 0045-5067,1208-6037
DOI: 10.1139/cjfr-2017-0299